US Patent 9352186 Treadmill with selectively engageable deck stiffening mechanism

A treadmill includes an impact absorption mechanism operatively positioned at least in part between a deck and a base frame of the treadmill so that the impact absorption mechanism enables the deck to move relative to at least a portion of the base frame during impact events on the deck and a selectively engageable deck stiffening mechanism that reduces the amount of movement of at least a portion of the deck relative to the base frame during impact events on the deck. The deck stiffening mechanism includes one or more generally rigid members and an engaging mechanism. The engaging mechanism selectively engages the one or more generally rigid members with the deck to provide support to the deck during impact events on the deck.